Hey just joined after lurking for almost a year! Please feel free to suggest any modifications to my build as not everything is bought yet and I want to do this right. I have been reading a lot and decided that I am just posting a tank build for an undecided ceph. Hopefully a pair a cuddles but would be just as happy with an octo. I am just about to begin the mixing and cycling my old 75gal 48.5"L x 18.5"W x 21.125"H tank with a bottom overflow. It was a reef tank a few years back that has my best lid situation while being over the 50gal minimum (for smaller species I know). Its going to need a cover for the gap on the left side and some screen work on the overflow/return. I see that foam is also suggested in conjunction with the mesh but is this a must or which would be recommended? Should this be weighted down since it does have a break with a grommet for opening? I will be upgraded the sump at this point to either an eshopss r200 gen2 or a homemade replica of it after living with the stock all in one noisy sump. This will probably add about 20 or so gal to the water volume I would think and give me room for a refugium to store live foods for later consumption. http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=24529 For the skimmer will be reusing my vertex omega 150 since it is technically rated for 150gal tank and worked nicely on a heavily stocked version on this tank.http://www.bulkreefsupply.com/vertex-omega-150-protein-skimmer.html For lighting I have a t5 4x10k atm with some "moonlight' leds and a few othr bulb selections I have been playing around with. Is this to much for 8-12 hours a day?http://www.marinedepot.com/Coralife..._Fixtures-Coralife-ES08604-FILTFIT54U-vi.html I also have a mp10 that I'd like to use just for some circulation as my return just isn't quite adequate all alone. I can control it through my apex so can crank it way down. Next on to the apex with ph, temp, and salinity... Will control lights, pumps, power head ect.... to bad no ammonia, nitrate/nitrite probes huh, but they'd probably be ridiculous, so strips and a hanna phos checker for the rest. My return is rated at about 950gph I believe so decent rate of probably 5-7 full cycles/h after you deduct the overhead of tubing and what not. I use brs reactors, one with some carbon and another with gfo. Thanks for any advice and I will begin cycling the tank in about a week in hopes of obtaining a ceph is 4-6 months! I will also put a few a few smaller fish from my reef tank in just to test cycling and help in building up bacteria but will absolutely be removing them prior to his/her arrival. No copper ect has or will be used in either tank and I use ro water so no cloramines.